WO2017099175A1

WO2017099175A1 - Plasma reactor

Info

Publication number: WO2017099175A1
Application number: PCT/JP2016/086536
Authority: WO
Inventors: 伸介伊藤; 灘浪　紀彦; 和彦間所; 一哉内藤; 上西　真里; 田中　裕久
Original assignee: 日本特殊陶業株式会社
Priority date: 2015-12-09
Filing date: 2016-12-08
Publication date: 2017-06-15
Also published as: JP2017104803A

Abstract

This plasma reactor is provided with a plasma panel stack (20) and electrically conductive members (50, 51). A plasma panel stack (20) has a structure in which electrode panels (30) are stacked, and plasma is generated between adjacent electrode panels (30). The stacking direction of the electrode panels (30) is 90°±45° relative to the vertical direction. The electrically conductive members (50, 51) are connected to a discharge electrode of the electrode panels (30), and are disposed in the region at the upper half of the plasma panel stack (20).

Description

Plasma reactor

The present invention relates to a plasma reactor, and more particularly to a plasma reactor suitable for an apparatus for purifying exhaust gas of an internal combustion engine (engine).

Engine, particularly diesel engine exhaust gas contains CO (carbon monoxide), HC (hydrocarbon), NOx (nitrogen oxide), PM (particulate matter), and the like. In recent years, as a method for removing PM contained in exhaust gas, for example, PM is collected by DPF (Diesel particulate filter) and collected by DPF by raising the temperature of exhaust gas by post injection of fuel or in-pipe injection. A technique for burning fresh PM has been proposed. However, since fuel is consumed when PM is burned, there is a problem that fuel efficiency is deteriorated. Also, in so-called city riding (city driving), the temperature of the exhaust gas does not reach the temperature at which PM is burned, so it is not suitable for small cars frequently used for city riding.

Therefore, a plurality of electrode panels on which discharge electrodes are formed are stacked, and a voltage is applied between adjacent electrode panels to generate low-temperature plasma (non-equilibrium plasma) due to dielectric barrier discharge, thereby flowing between the electrode panels. Various plasma reactors that oxidize and remove PM in exhaust gas have been proposed (see, for example, Patent Document 1). More specifically, Patent Document 1 has a structure in which a plate-like dielectric having electrode members (discharge electrodes) formed on the front or back surface is vertically stacked, and a voltage is applied between adjacent electrode members. Thus, a technique for generating plasma is disclosed. The electrode member is energized by a pair of lead line members (electrically conductive members) penetrating a plurality of electrode panels in the stacking direction, and the upper end portions of both lead line members extend from the upper surface of the stacked body of electrode panels. Connected to protruding external terminals.

Japanese Patent No. 3832654 (FIG. 4 etc.)

By the way, when the plasma reactor is mounted on a vehicle or the like and used, water may flow into the plasma reactor. Here, as the water flowing into the plasma reactor, for example, exhaust condensed water generated due to condensation in the exhaust pipe at the time of cold start of the vehicle, water flowing from the muffler as the vehicle enters the puddle, etc. There is.

However, in the prior art described in Patent Document 1, since the lead line member extends from the uppermost electrode panel to the lowermost electrode panel, even if a small amount of water flows in, the lead line member becomes water. I'm soaked. As a result, a pair of lead line members that should normally be insulated are electrically connected to each other through water, which may cause leakage current. In this case, since the amount of plasma generated with respect to the input power is reduced, there is a problem that the exhaust gas purification efficiency is low.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a plasma reactor capable of reliably generating plasma even when water flows in.

As means (means 1) for solving the above-mentioned problem, plasma has a structure in which a plurality of electrode panels having discharge electrodes are stacked, and plasma is generated when a voltage is applied between the adjacent electrode panels. A plasma reactor comprising a panel laminate and an electrically conductive member electrically connected to the discharge electrodes of the plurality of electrode panels, wherein a stacking direction of the plurality of electrode panels is 90 ° with respect to a vertical direction. There is a plasma reactor in which an angle of ± 45 ° is formed and the electrically conductive member is arranged in an upper half region of the plasma panel laminate.

Therefore, in the invention described in the means 1, the stacking direction of the plurality of electrode panels forms an angle of 90 ° ± 45 ° with respect to the vertical direction, and the electrically conductive member is located in the upper half region of the plasma panel stack. Is arranged. Therefore, even if water flows into the plasma reactor, the electrically conductive member responsible for energizing each electrode panel is less likely to be submerged, so that it is possible to prevent the occurrence of a leakage current due to the submergence of the electrically conductive member. Therefore, since a sufficient amount of plasma is generated with respect to the input power, PM in the exhaust gas flowing between adjacent electrode panels is oxidized and removed using plasma, so that PM can be efficiently removed. it can.

The plasma panel laminate constituting the plasma reactor has a structure in which a plurality of electrode panels on which discharge electrodes are formed are laminated. Examples of the material for forming the discharge electrode include tungsten (W), molybdenum (Mo), ruthenium oxide (RuO ₂ ), silver (Ag), copper (Cu), platinum (Pt), and the like.

The plasma reactor has a case in which the plasma panel laminate is accommodated, and an external terminal that is electrically connected to the electrically conductive member and exposed from the case. In the plasma reactor, at least the electrically conductive member disposed in the case may be disposed in the upper half region of the plasma panel laminate. However, it is more preferable that the conductive portion constituting the external terminal outside the case is also disposed in the upper half region of the plasma panel laminate. That is, in addition to the electrical conductive member being disposed in the case, the external terminals are preferably disposed in the upper half region of the plasma panel laminate outside the case. In this way, when water flows into the plasma reactor, the electrical conducting member in the case is not easily submerged, and when the plasma reactor is submerged, the external terminal outside the case is submerged. It becomes difficult. For this reason, generation | occurrence | production of the leakage current resulting from the water immersion of an electrically-conductive member and an external terminal can be prevented.

Further, the plasma panel laminate has, for example, a pair of gas passage surfaces and a plurality of gas non-passage surfaces between the pair of gas passage surfaces. In this case, a plurality of external terminals are provided, and the plurality of external terminals are preferably arranged on the same gas non-passing surface. In this way, since the external terminals are arranged on the same surface, wiring of the wiring connected to the external terminals (for example, avoidance of wiring from a high-temperature exhaust pipe) can be performed when mounted on a vehicle or the like. It becomes easy.

Further, when the plasma reactor of the above means 1 is mounted under the floor of the vehicle (for example, an exhaust pipe), if the external terminal protrudes in the vertical direction, the wiring connected to the external terminal easily comes into contact with the floor of the vehicle, for example. Therefore, it may be difficult to draw out the wiring. Therefore, in the above means 1, the plurality of external terminals can be projected in a direction that forms an angle of 90 ° ± 45 ° with respect to the vertical direction, in other words, in a direction parallel to the stacking direction of the electrode panel. Good. In this way, the wiring connected to the external terminal can be easily pulled out. Further, since the length of the plasma reactor in the vertical direction is reduced, the degree of freedom in mounting the plasma reactor is increased. Moreover, the plurality of external terminals are preferably arranged in the upper half region of the gas non-passing surface parallel to the electrode panel. In this way, even if the external terminal protrudes in a direction that makes an angle of 90 ° ± 45 ° with respect to the vertical direction, the external terminal is less likely to be submerged. Generation of current can be prevented more reliably.

The electrode panel has a rectangular shape in plan view, and the length of the side extending along the passage direction of the gas flowing between the adjacent electrode panels is the length of the side extending along the direction orthogonal to the passage direction. Longer than this is better. In this way, the gas passing between the adjacent electrode panels is longer than the case where the length of the side extending along the gas passage direction is equal to or less than the length of the side extending along the direction orthogonal to the passage direction. Is exposed to plasma for a long time. As a result, when PM in exhaust gas flowing between adjacent electrode panels is oxidized and removed using plasma, PM can be removed more efficiently.

The electrode panel has a first main surface and a second main surface, and is provided with a conduction structure for conducting the first main surface side and the second main surface side in the upper region of the electrode panel. Also good. If it does in this way, when a plurality of electrode panels are laminated, electrode panels can be made to conduct reliably.

1 is a schematic cross-sectional view showing a plasma reactor in the present embodiment. The perspective view which shows a plasma reactor. The perspective view which shows the state in which the plasma panel laminated body is accommodated in the case. The perspective view which shows a plasma panel laminated body, a clamp, and an external terminal. The perspective view which shows an electrode panel. The top view which shows an electrode panel. Sectional drawing which shows an external terminal. The perspective view which shows a plasma panel laminated body, a clamp, and an external terminal in other embodiment.

Hereinafter, an embodiment embodying the plasma reactor 1 of the present invention will be described in detail with reference to the drawings.

As shown in FIGS. 1 to 3, the plasma reactor 1 of the present embodiment is a device that removes PM contained in exhaust gas of an automobile engine (not shown), and is attached to an exhaust pipe 2. . The plasma reactor 1 includes a pulse generation power source 3, a case 10, and a plasma panel laminate 20.

The case 10 is formed in a tubular shape (tubular shape) using, for example, stainless steel. A first cone portion 11 is connected to a first end portion (left end portion in FIG. 1) of the case 10, and a second cone portion 12 is connected to a second end portion (right end portion in FIG. 1) of the case 10. Yes. Further, the first cone portion 11 is connected to the upstream portion 4 (engine portion) of the exhaust pipe 2, and the second cone portion 12 is connected to the downstream portion 5 (opposite side of the engine side) of the exhaust pipe 2. Part). The exhaust gas from the engine flows into the case 10 from the upstream portion 4 of the exhaust pipe 2 through the first cone portion 11, passes through the case 10, and then passes through the second cone portion 12 to the exhaust pipe. 2 flows out to the downstream part 5.

As shown in FIGS. 1 and 3, the plasma panel laminate 20 is accommodated in the case 10, and the mat 6 is interposed between the case 10 and the plasma panel laminate 20. Here, as an insulating material which comprises the mat | matte 6, a ceramic fiber, a metal fiber, a foam metal etc. can be used, for example. The mat 6 has a function of holding the plasma panel laminate 20 in the case 10.

As shown in FIGS. 1, 3, and 4, the plasma panel laminate 20 has a substantially rectangular parallelepiped shape having a pair of gas passage surfaces 21 and 22 and four gas non-passage surfaces 23, 24, 25, and 26. I am doing. Both gas passage surfaces 21 and 22 are located on opposite sides of the plasma panel laminate 20. On the other hand, the gas non-passing surfaces 23 to 26 are located between the pair of

gas passing surfaces

21 and 22.

The plasma panel laminate 20 has a structure in which a plurality of electrode panels 30 are laminated. The stacking direction of the electrode panel 30 is a direction (Y direction) that forms an angle of 90 ° with respect to the vertical direction (Z direction). Each electrode panel 30 is disposed in parallel with the passage direction of the exhaust gas in the case 10 (the X direction that is the direction from the first cone portion 11 toward the second cone portion 12), and is spaced from each other (this embodiment). Then, they are spaced apart so as to have a gap of 0.5 mm. Specifically, the plasma panel laminate 20 has a gas flow path 27 (see FIG. 1) through which gas passes between the adjacent electrode panels 30. The gas flow path 27 includes an opening 28 that opens at both end surfaces of the electrode panel 30 (that is, the surfaces constituting the gas passage surfaces 21 and 22 of the plasma panel laminate 20). In addition, the plasma reactor 1 of this embodiment is a vertical reactor in which the opening 28 is vertically long (see FIGS. 3 and 4).

As shown in FIG. 1, the first wiring 7 and the second wiring 8 are alternately electrically connected to each electrode panel 30 along the thickness direction of the plasma panel laminate 20. The first wiring 7 is electrically connected to the first terminal of the pulse generating power supply 3, and the second wiring 8 is electrically connected to the second terminal of the pulse generating power supply 3.

As shown in FIGS. 1, 5, and 6, the electrode panel 30 of the present embodiment has a first main surface 31 and a second main surface 32, and has a substantially rectangular plate shape of length 100 mm × width 200 mm. ing. The first main surface 31 and the second main surface 32 are located on opposite sides in the thickness direction of the electrode panel 30. The electrode panel 30 has a rectangular shape in plan view, and the length of the side 33 extending along the passage direction (lateral direction) of the gas flowing between the adjacent electrode panels 30 is perpendicular to the passage direction. It is longer than the length of the side 34 extending along (vertical direction).

Further, the electrode panel 30 has a structure in which a discharge electrode 36 (thickness 10 μm) is built in a rectangular plate-like dielectric 35. In the present embodiment, the dielectric 35 is made of ceramic such as alumina (Al ₂ O ₃ ), and the discharge electrode 36 is made of tungsten (W). The dielectric 35 has a recess 37 that opens at the second main surface 32. The concave portion 37 extends in the lateral direction of the electrode panel 30 and opens at both end surfaces of the electrode panel 30. In the plasma panel laminate 20 of the present embodiment, the gas flow path 27 described above is configured by the recess 37 and the first main surface 31 of the electrode panel 30 adjacent to the lower layer side. The lowermost electrode panel 30 constituting the plasma panel laminate 20 is not formed with the recess 37 because the electrode panel 30 does not exist on the lower layer side.

As shown in FIG. 5 and FIG. 6, a pair of conductive structures 40 for conducting the first main surface 31 side and the second main surface 32 side are provided in the upper region of the electrode panel 30. Each conduction structure 40 includes a through-hole conductor 41, a first pad 42, and a second pad 43, which are electrical conduction members. The through-hole conductor 41 passes through the first main surface 31 and the second main surface 32. And the through-hole conductor 41 provided in one conduction | electrical_connection structure 40 penetrates the extension part 38 extended in the outer peripheral side from the discharge electrode 36 in addition to the 1st main surface 31 and the 2nd main surface 32. Yes. The first pad 42 is formed on the upper end portion of the first main surface 31 in the electrode panel 30. The first pad 42 is electrically connected to the end portion of the through hole conductor 41 on the first main surface 31 side. On the other hand, the second pad 43 is formed on the upper end portion of the second main surface 32 in the electrode panel 30. The second pad 43 is electrically connected to the end of the through hole conductor 41 on the second main surface 32 side. The first pad 42 and the second pad 43 each have a rectangular shape, and the surface thereof is plated with Ni or the like.

As shown in FIG. 4, the plasma reactor 1 includes a pair of

first clamps

50 and 51 for sandwiching and fixing each electrode panel 30 (plasma panel laminate 20) from above, and each electrode panel 30 from below. A pair of

second clamps

52 and 53 to be fixed is provided. Each clamp 50 to 53 is formed by bending a metal plate (for example, a stainless steel plate). The first clamps 50 and 51 have a function as an electrically conductive member that is electrically connected to the discharge electrode 36 in addition to the function of sandwiching each electrode panel 30. The first clamps 50 and 51 are arranged in the upper half region of the plasma panel laminate 20 in the case 10 and are not arranged in the lower half region of the plasma panel laminate 20. On the other hand, the

second clamps

52 and 53 have only a function of sandwiching each electrode panel 30. The second clamps 52 and 53 are disposed in the lower half region of the plasma panel laminate 20 in the case 10. Here, the “upper half region of the plasma panel laminate 20” refers to a region that becomes the upper half in the vertical direction when the plasma reactor 1 is attached to the vehicle. Similarly, the “lower half region of the plasma panel laminate 20” refers to a region that is the lower half in the vertical direction when the plasma reactor 1 is attached to the vehicle. Specifically, in the plasma panel laminate 20, a virtual plane C1 passing through the intersection P1 of the two diagonal lines L1 set on the first main surface 31 of the uppermost electrode panel 30 is set. The virtual plane C1 is arranged in parallel to the stacking direction of the electrode panels 30 and in parallel to the passage direction of the exhaust gas flowing between the adjacent electrode panels 30. And the plasma panel laminated body 20 is divided into 1st area | region A1 and 2nd area | region A2 on the basis of the virtual surface C1. The first clamps 50 and 51 are arranged in the first area A1, and are not arranged in the second area A2. On the other hand, the

second clamps

52 and 53 are disposed in the second region A2.

Further, as shown in FIG. 4, the clamps 50 to 53 include a clamp body 54 and a pressing plate 55. The clamp body 54 extends in the stacking direction of the electrode panel 30. The holding plate 55 is formed integrally with the clamp body 54 and is disposed at both ends of the clamp body 54. Each pressing plate 55 is a leaf spring having elasticity and a folded structure. The pair of pressing plates 55 constituting the

first clamps

50 and 51 constitute the plasma panel laminate 20 and the upper end portion of the first main surface 31 of the uppermost electrode panel 30 constituting the plasma panel laminate 20. The lowermost electrode panel 30 is in pressure contact with the upper end of the second main surface 32 of the lowermost electrode panel 30. One of the pressing plates 55 constituting the first clamp 50 is in pressure contact with the first pad 42 formed on the plasma panel laminate 20. One of the pressing plates 55 constituting the first clamp 51 is in pressure contact with the second pad 43 formed on the plasma panel laminate 20. On the other hand, the pair of pressing plates 55 constituting the

second clamps

52 and 53 constitute the plasma panel laminate 20 and the lower end portion of the first main surface 31 of the uppermost electrode panel 30 constituting the plasma panel laminate 20. The lowermost electrode panel 30 is in pressure contact with the lower end of the second main surface 32 of the lowermost electrode panel 30.

As shown in FIGS. 2 to 4 and 7, the plasma reactor 1 includes a pair of

external terminals

60 and 61. The

external terminals

60 and 61 of this embodiment have the same structure as a spark plug. Specifically, the

external terminals

60 and 61 include an external connection portion 62, a conductive seal 63 containing metal powder, an insulator 64, a metal shell 65, a talc 66, a connection flange 67, packings 68, and the like. The external connection part 62 is connected to the middle shaft 69 (electrically conductive member) via the conductive seal 63. The middle shaft 69 protrudes from the holding plate 55 of the

first clamps

50, 51 and is inserted through a through hole provided in the case 10, and the tip is inserted into the insulator 64. The connection flange 67 is connected to the outer surface of the metal shell 65 and the outer surface of the case 10 to connect the

external terminals

60 and 61 to the case 10. The external terminal is not limited to the one in the present embodiment, and may have another structure as long as the external connection portion 62 and the case 10 are insulated by an insulator. .

Further, the base ends of the

external terminals

60 and 61 are electrically connected to the pressing plates 55 of the

first clamps

50 and 51, and the tip ends are exposed from the case 10 (see FIGS. 2 and 3). And the front-end | tip part of the external terminal 60 is connected to the 1st wiring 7, and the front-end | tip part of the external terminal 61 is connected to the 2nd wiring 8 (refer FIG. 1). The length of the pressing plate 55 to which the

external terminals

60 and 61 are connected is longer than the length of the other pressing plates 55. The

external terminals

60 and 61 are arranged on the same gas non-passing surface 26. Further, the

external terminals

60 and 61 are arranged in the upper half area of the gas non-passing surfaces 24 and 26 parallel to the electrode panel 30, that is, in the upper half area of the plasma panel laminate 20 outside the case 10. . The

external terminals

60 and 61 protrude in a direction (Y direction) that forms an angle of 90 ° with respect to the vertical direction (Z direction).

Note that, as shown in FIG. 1, the plasma reactor 1 of the present embodiment is used, for example, to remove PM contained in exhaust gas. In this case, when a pulse voltage (for example, peak voltage: 5 kV (5000 V), pulse repetition frequency: 100 Hz) is applied between the electrode panels 30 adjacent to each other from the pulse generating power supply 3, dielectric barrier discharge occurs, and the discharge electrode A plasma due to dielectric barrier discharge is generated between the electrodes 36. Due to the generation of plasma, PM contained in the exhaust gas flowing between the discharge electrodes 36 is oxidized (burned) and removed.

Next, a method for manufacturing the plasma reactor 1 will be described.

First, first to third ceramic green sheets to be the dielectric 35 are formed using a ceramic material whose main component is alumina powder. In addition, as a formation method of a ceramic green sheet, well-known shaping | molding methods, such as tape shaping | molding and extrusion molding, can be used. And each ceramic green sheet is laser-processed and a through-hole is formed in a predetermined position. The through hole may be formed by punching, drilling, or the like.

Next, using a conventionally known paste printing apparatus (not shown), the through holes of each ceramic green sheet are filled with a conductive paste (in this embodiment, a tungsten paste), and an unfired portion that becomes the through-hole conductor 41 is obtained. A through-hole conductor is formed.

Next, the first ceramic green sheet is placed on a support base (not shown). Furthermore, a conductive paste is printed on the back surface of the first ceramic green sheet using a paste printing apparatus. As a result, an unfired electrode having a thickness of 10 μm to be the discharge electrode 36 is formed on the back surface of the first ceramic green sheet. In addition, as a printing method of the unsintered electrode with respect to the 1st ceramic green sheet, well-known printing methods, such as screen printing, can be used.

Then, after the conductive paste is dried, the second ceramic green sheet and the third ceramic green sheet are sequentially laminated on the back surface of the first ceramic green sheet on which the unfired electrodes are printed, in the sheet lamination direction. Apply pressing force. As a result, the ceramic green sheets are integrated to form a ceramic laminate. Further, using a paste printing device, a conductive paste is printed on the main surface of the first ceramic green sheet to form the unfired first pad 42 and conductive on the back surface of the third ceramic green sheet. The non-sintered second pad 43 is formed by printing the conductive paste. Note that the third ceramic green sheet is laminated after being subjected to a punching process in accordance with the shape of the recess 37.

Next, after performing a drying process or a degreasing process according to a known method, a predetermined temperature (for example, about 1400 ° C. to 1600 ° C.) at which the ceramic laminate (ceramic green sheet and unfired electrode) can be sintered by alumina and tungsten. ) Is simultaneously fired. As a result, alumina in the ceramic green sheet and tungsten in the conductive paste are simultaneously sintered, and the dielectric 35, the discharge electrode 36, the through-hole conductor 41, the first pad 42, and the second pad 43 are simultaneously fired. The formed ceramic laminate becomes the electrode panel 30.

Thereafter, a plurality of obtained electrode panels 30 are laminated to form a plasma panel laminate 20. Next, using the clamps 50 to 53, the plurality of electrode panels 30 are sandwiched and fixed in the stacking direction. At this time, one of the pressing plates 55 constituting the first clamp 50 comes into pressure contact with the first pad 42, and one of the pressing plates 55 constituting the first clamp 51 comes into pressure contact with the second pad 43. Further, by performing welding or the like, the base end portions of the

external terminals

60 and 61 are attached to one of the both holding plates 55 constituting the first clamp 50 and one of the both holding plates 55 constituting the first clamp 51. Connecting. As a result, both

external terminals

60 and 61 are arranged on the same gas non-passing surface 26 and protrude in a direction perpendicular to the vertical direction. Next, the first wiring 7 is connected to the distal end portion of the external terminal 60, and the second wiring 8 is connected to the distal end portion of the external terminal 61. The plasma reactor 1 is completed through the above processes.

Therefore, according to this embodiment, the following effects can be obtained.

(1) In the plasma reactor 1 of the present embodiment, the stacking direction of the electrode panels 30 constituting the plasma panel stack 20 is set to a direction (Y direction) that forms an angle of 90 ° with respect to the vertical direction (Z direction). The first clamps 50 and 51 are arranged in the upper half region of the plasma panel laminate 20. Therefore, even if water flows into the plasma reactor 1, the

first clamps

50 and 51 responsible for energizing each electrode panel 30 are less likely to be submerged, so that leakage current is generated due to the submersion of the

first clamps

50 and 51. Can be prevented. Therefore, since a sufficient amount of plasma is generated with respect to the input power, PM in the exhaust gas flowing between adjacent electrode panels 30 is oxidized and removed using plasma, and PM is efficiently removed. Can do.

(2) Furthermore, in the plasma reactor 1 of the present embodiment, the

external terminals

60 and 61 are arranged in the upper half region of the plasma panel laminate 20 outside the case 10. As a result, when water flows into the plasma reactor 1, the

first clamps

50 and 51 in the case 10 are less likely to be submerged, and when the plasma reactor 1 is submerged, there is an external outside the case 10. The

terminals

60 and 61 are not easily submerged. For this reason, generation | occurrence | production of the leakage current resulting from the submersion of the 1st clamps 50 and 51 and the

external terminals

60 and 61 can be prevented.

(3) The plasma reactor 1 of this embodiment is attached to the exhaust pipe 2 via the first cone portion 11 and the second cone portion 12. As a result, the resistance in the exhaust gas flow path in which the exhaust gas flows in the order of the upstream portion 4 of the exhaust pipe 2 → the first cone portion 11 → the plasma reactor 1 → the second cone portion 12 → the downstream portion 5 of the exhaust pipe 2 is reduced. Therefore, the pressure loss in the exhaust gas passage can be suppressed. As a result, it is possible to prevent the engine output from decreasing due to pressure loss.

In addition, you may change the said embodiment as follows.

In the plasma reactor 1 of the above embodiment, the pair of

external terminals

60 and 61 protrude in a direction (Y direction) that forms an angle of 90 ° with respect to the vertical direction (Z direction). , It may protrude in a direction different from the Y direction. For example, as shown in FIG. 8, the pair of

external terminals

70 and 71 may protrude in the vertical direction (Z direction).

In the plasma reactor 1 of the above embodiment, the pair of

external terminals

60 and 61 are disposed on the same gas non-passing surface 26, but the external terminals may be disposed on different gas non-passing surfaces. Good. For example, as shown in FIG. 4, when two

external terminals

60 and 61 are provided, one external terminal 60 is disposed on the gas non-passing surface 23 and the other external terminal 61 is a gas. You may arrange | position on the gas non-passing surface 26 different from the non-passing surface 23. FIG.

The electrode panel 30 of the above embodiment is configured by incorporating the discharge electrode 36 in the dielectric 35. However, the electrode panel may be configured by forming the discharge electrode 36 on the surface of the dielectric 35.

-Although the plasma reactor 1 of the said embodiment was used for exhaust gas purification of the engine of a motor vehicle, you may use it for exhaust gas purification of engines, such as a ship, for example. Moreover, the plasma reactor 1 should just perform a plasma process, and does not need to perform the process of waste gas, and does not need to be used for purification | cleaning.

Next, in addition to the technical ideas described in the claims, the technical ideas grasped by the embodiment described above are listed below.

(1) The plasma reactor according to the means 1, wherein the electrically conductive member is not disposed in a lower half region of the plasma panel laminate.

(2) In the means 1, a gas flow path through which a gas passes is provided between the adjacent electrode panels, and the gas flow path includes openings that are opened at both ends of the electrode panel, and the plasma The reactor is a vertically placed reactor in which the opening is vertically long.

(3) In the above means 1, the electrode panel has a first main surface and a second main surface, and the first main surface side and the second main surface side in the upper region of the electrode panel. A conduction structure is provided, wherein the conduction structure is formed in the first main surface and the through hole conductor that penetrates the first main surface and the second main surface, A first pad electrically connected to one main surface side end portion and a second pad formed on the second main surface and electrically connected to the second main surface side end portion of the through-hole conductor And a plasma reactor.

(4) A plasma panel laminate having a structure in which a plurality of electrode panels having discharge electrodes are laminated, and generating a plasma when a voltage is applied between the adjacent electrode panels, and the plurality of electrode panels A plasma reactor comprising an electrically conductive member electrically connected to a discharge electrode, wherein a stacking direction of the plurality of electrode panels forms an angle of 90 ° ± 45 ° with respect to a vertical direction. , Having a substantially rectangular plate shape having a first main surface and a second main surface, the plasma panel laminate passing through an intersection of two diagonal lines set on the first main surface, and the stacking direction Is divided into a first region and a second region on the basis of a virtual plane parallel to the passage direction of the gas flowing between the adjacent electrode panels, and the electrically conductive member is the first conductive member. Is located in the area Plasma reactor, characterized in that.

Although the present invention has been described in detail and with reference to specific embodiments, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the invention.
This application is based on a Japanese patent application filed on December 9, 2015 (Japanese Patent Application No. 2015-240438), the contents of which are incorporated herein by reference.

The plasma reactor of the present invention is useful for exhaust gas purification devices for engines, particularly diesel engines.

DESCRIPTION OF SYMBOLS 1 ... Plasma reactor 10 ... Case 20 ... Plasma panel laminated

body

21,22 ...

Gas passage surface

23, 24, 25, 26 ... Gas non-passage surface 30 ... Electrode panel 31 ... 1st main surface 32 ... 2nd main surface 33 ... Side 34 extending along the passage direction of the gas flowing between the adjacent electrode panels ... Side 36 extending along the direction orthogonal to the passage direction of the gas flowing between the adjacent electrode panels ... Discharge electrode 40 ... Conducting structure 41 ... Electrical conduction Through-hole conductor 42 as member ... First pad 43 as electric conduction member ...

Second pads

50, 51 as electric conduction member ... First clamps 60, 61, 70, 71 as electric conduction member ... External terminal 69 ... Central shaft as an electrically conductive member

Claims

A plasma panel laminate having a structure in which a plurality of electrode panels having discharge electrodes are laminated, and generating plasma when a voltage is applied between the adjacent electrode panels;
A plasma reactor comprising: an electrically conductive member electrically connected to the discharge electrodes of the plurality of electrode panels;
The stacking direction of the plurality of electrode panels forms an angle of 90 ° ± 45 ° with respect to the vertical direction,
The plasma reactor according to claim 1, wherein the electrically conductive member is disposed in an upper half region of the plasma panel laminate.
A case in which the plasma panel laminate is accommodated, and an external terminal that is electrically connected to the electrically conductive member and exposed from the case,
The electrically conductive member is disposed in the case;
2. The plasma reactor according to claim 1, wherein the external terminal is disposed in an upper half region of the plasma panel laminate outside the case.
Having an external terminal electrically connected to the electrically conductive member;
The plasma panel laminate has a pair of gas passage surfaces and a plurality of gas non-passage surfaces between the pair of gas passage surfaces,
A plurality of the external terminals are provided,
The plasma reactor according to claim 1, wherein the plurality of external terminals are disposed on the same non-passing surface of the gas.
4. The plasma reactor according to claim 3, wherein the plurality of external terminals protrude in a direction that forms an angle of 90 ° ± 45 ° with respect to the vertical direction.
5. The plasma reactor according to claim 3, wherein the plurality of external terminals are arranged in an upper half region of the gas non-passing surface parallel to the electrode panel.
The electrode panel has a rectangular shape in plan view, and the length of the side extending along the passage direction of the gas flowing between the adjacent electrode panels is a side extending along the direction orthogonal to the passage direction. 6. The plasma reactor according to claim 1, wherein the plasma reactor is longer than the length.
The electrode panel has a first main surface and a second main surface,
The plasma reactor according to any one of claims 1 to 6, further comprising a conductive structure that conducts the first main surface side and the second main surface side in an upper region of the electrode panel. .